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Holley 300-683 LS3 Manifold Kit, Dual Injector, Fuel Rails, Satin

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#425300683

Holley 300-683 LS3 Manifold Kit, Dual Injector, Fuel Rails, Satin

Designed for GM LS Gen III and IV engines equipped with GM LS3/L92 cylinder heads
Provides best performance for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm, depending on the application
Dual-injector, separate-passage, high-volume fuel rails with mounting hardware, dual-fuel capable, 8 AN o-ring ports

$1,249.95

Factory Shipped

$1,325.95

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Product Summary

EFI Fuel System Type, Multi-port Injection Style, Satin

Designed for GM LS Gen III and IV engines equipped with GM LS3/L92 cylinder heads
Provides best performance for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm, depending on the application
Dual-injector, separate-passage, high-volume fuel rails with mounting hardware, dual-fuel capable, 8 AN o-ring ports
Low height to aid the packaging of a plenum mounted air-to-water intercooler in a top-feed configuration
Available with both as-cast satin and black power-coat finishes

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Key Specs

MFG. Part #	300-683
Injection Style	Multi-port
Intake Manifold Type	Lo-Ram
RPM Range	3,500-8,000
Material Type	Cast Aluminum

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Holley 300-683 Details

The LS3/L92 Lo-Ram manifolds base intake manifold is designed with a low height to aid the packaging of a plenum mounted air-to-water intercooler for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm. The Holley LS3 Lo-Ram intake manifold kits are designed for GM LS Gen III and IV engines equipped with GM LS3/L92 cylinder heads. These intake manifolds will work with OE or aftermarket cylinder heads. The Lo-Ram intake manifolds are designed for forced induction (supercharged or turbocharged) engine applications and the 105 mm throttle body part number 112-581 or similar models. The base intake manifold is designed with a low height to aid the packaging of a plenum-mounted air-to-water intercooler. Additional manifold designs include both single and dual injector options. Available with both as-cast satin and black power-coat finishes. High volume fuel rails for eight and sixteen injector configurations. Mounting hardware included with 3/4-16 O-ring ports (8 AN)

Features:

Designed for GM LS Gen III and IV engines equipped with GM LS3/L92 cylinder heads
Provides best performance for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm, depending on the application
Dual-injector, separate-passage, high-volume fuel rails with mounting hardware, dual-fuel capable, 8 AN o-ring ports
Low height to aid the packaging of a plenum mounted air-to-water intercooler in a top-feed configuration
Available with both as-cast satin and black power-coat finishes
High volume fuel rails for eight and sixteen injector configurations. Mounting hardware included with3/4-16 O-ring ports (8 AN)and mounting hardware included with 3/4-16 O-ring ports (8 AN)

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Instructions (PDF)

Guides & Documents

Intake Manifolds Installation Instructions (425300683)

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CARB warning

Holley 300-683 Specifications

KEY SPECS
MFG. Part #	300-683
Brand	Holley
Injection Style	Multi-port
Intake Manifold Type	Lo-Ram
RPM Range	3,500-8,000
Material Type	Cast Aluminum

GENERAL
Fuel System Type	EFI
Finish	Satin
Color	Silver
EGR	No
Cylinder Head Configuration	Rectangular Port
Throttle Body Bore Size	105mm
Intake Section Included	Complete
Plenum Material	Aluminum
Plenum Finish	Satin
Base Finish	Satin
Base Material	Aluminum
Throttle Body Included	No
Injectors Included	No
Aftermarket Fuel Rail Required	Yes
Fuel Rails Included	Yes
Hardware Included	Yes
Runners Included	Yes
Runners Removable	No
Supplemental Bosses Cast-In	No
Supplemental Bosses Machined	No
Emission Code	3
Sold in Quantity	Each
GTIN Code	090127100950

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